Mould Making and CastingMould Making and CastingTue, 14 Aug 2018 22:54:25 +0000Tue, 14 Aug 2018 22:54:25 +0000Composite Answershttp://composite-answers.com/index.php?forums/mould-making-and-casting.25/
Casting a large bit of woodTue, 22 Aug 2017 14:27:35 +0000http://composite-answers.com/index.php?threads/casting-a-large-bit-of-wood.108/
http://composite-answers.com/index.php?threads/casting-a-large-bit-of-wood.108/Tony_CTony_C
I want to cast a large piece of wood, or to be honest it's two piece joined, in clear resin to preserve them.
The pieces are both sliced across the grain and laid on top of each other, one is a large slice straight across a log, aprox 240mm diameter and about 20mm thick, the other is not so large, 120mm diametera nd about 100mm high. The larger piece is glued in place on top of the smaller, so it looks like a mushroom.
I have a 250mm silicone cake mold, would this be suitable to cast...

Casting a large bit of wood]]>1Advise as to what silicone is best suited for use with polyester?Fri, 17 Feb 2017 13:40:10 +0000http://composite-answers.com/index.php?threads/advise-as-to-what-silicone-is-best-suited-for-use-with-polyester.105/
http://composite-answers.com/index.php?threads/advise-as-to-what-silicone-is-best-suited-for-use-with-polyester.105/Jonny (Cave Fox Holds)Jonny (Cave Fox Holds)
I was hoping you might be able to advise me on the best silicone to choose as I'm having trouble at the moment.

I'm casting unfilled, polyester/silica formula climbing holds using addition cure silicone moulds. I previously used condensation cure silicone too. My issue is that the moulds tend to degrade rather quickly in some of the finer detail areas, in particular recessed areas or areas that are fully surrounded by polyester (i.e. a bolt hole). The silicone in these areas goes...

Advise as to what silicone is best suited for use with polyester?]]>3Can I use a RTV mould for plastic injection?Thu, 22 Dec 2016 08:16:33 +0000http://composite-answers.com/index.php?threads/can-i-use-a-rtv-mould-for-plastic-injection.102/
http://composite-answers.com/index.php?threads/can-i-use-a-rtv-mould-for-plastic-injection.102/GamberGamber
Can I use a RTV mould for plastic injection?

Thank you.]]>2Vacuum formed moulding QuestionThu, 10 Nov 2016 20:18:39 +0000http://composite-answers.com/index.php?threads/vacuum-formed-moulding-question.97/
http://composite-answers.com/index.php?threads/vacuum-formed-moulding-question.97/tugboatrobtugboatrob
I have been given a small plastic moulding it has the back cut off of it so is a lot smaller than I would have liked.

Is there anyway of making a mould from the plastic ?

Or is that a bad Idea ?

Many thanks]]>5mirror cover mould using fibreglassThu, 30 Jun 2016 19:45:15 +0000http://composite-answers.com/index.php?threads/mirror-cover-mould-using-fibreglass.95/
http://composite-answers.com/index.php?threads/mirror-cover-mould-using-fibreglass.95/wacker315wacker315
I am new to the mould making scene but i have been a composite laminator for nearly 6 years. I am very familar with pre preg materials but i have done nothing with fibreglass etc. I have picked up a little bit of knowledge here and there along the way. I am currently in the process of making some fibreglass mirror covers so i can then produce the covers using pre preg LTM carbon fibre.

I am putting the covers together to produce 1 mould and also using a mild steel plate to sit them...